Signob to geimme



seb. 17. 1925.

H. HOFF-'MEISTER GALCULATING MACHINE Filed March e, 1924 bf Di. hmmm.

C. u. .-hg. bock dudu:

Patented Feb. 17, 1925.

UNITED STATES HERMANN HOFFMEISTER, 0F GLIESMARODE, NEAR BRUNSWICK, GERMANY, AS-

SIGNOR TO GRIMME, NATALIS c CO.,

AKTIENGESELLSCHAFT, BRAUNSCHWEIG,

GERMANY, A CORPORATION OF GERMANY.

CALCULATING MACHINE.

Application led March 6, 1924. Serial No. 697,423.

To all whom t may concern Be it known that I, HERMANN Horrirnrs'rnn, a citizen of Germany, residing at Gliesmarode, near Brunswick, Germany, have invented certain new and useful Improvements in Calculating Machines (for which I have led applications in Germany, March 12, 1923; Austria, February7,1921; Sweden, February 13, 1924), of which the following is a specification.

My invention relates to improvements in calculating machines, and more particularly in lcalculating machines of the type provided with two revolutions counting mechanisms adapted to be operated by the same single tooth wheel or other driving member. rlhe object of the improvements is to provide a machine of this type in which the driving member is adapted either for simultaneous driving engagement with both revolutions counting mechanisms, or with either one of them. Vith this object in view I dispose the gears of corresponding numeral wheels of the revolutions counting mechanisms ap proximately in the same planes, but so as to be displaced with relation to each other in axial direction a dista-nce less than the breadth of the gears so that the gears are in the same planes only with a portion of their breadth, and that they project beyond each other at opposite sides. The single tooth wheel is mounted on its axis so as to be axially shittable thereon from the median position in which it is in engagement with both gears in one or the other direction and so far that it is in position Jfor engagement with one or the other gear.

For the purpose of explaining the invention an example embodying the same has been shown in the accompanying drawings in which the same reference characters have been used in all the views to indicate corresponding parts. In said drawings,

Fig. 1, is a sectional elevation showing my improved apparatus,

Fig. 2, is a plan view showing a detail,

Fig. 3, is an elevation showing the relative position of corresponding gears of the revolutions counting mechanism,

Fig. 4, is a detail view partly in section showing the single tooth wheel and the means for shifting the same in axial direction relatively to the shitting member conv nected with the carriage of the registering mechanism, and

Fig. 5, is a bottom View showing a part of the shifting means of the single tooth wheel looking in the direction of the arrows 5, 5 shown in Fig. 4L.

In the igures I have shown a calculating machine comprising, a setting mechanism, a registering mechanism r mounted on a carri age r1 and shiftable in a direction parallel to the setting mechanism, a machine crank t adapted to impart rotary movement to the setting mechanism for transmitting the values set thereon to the registering mechanism, and to a shaft d having the single tooth wheel 02 axially shiftable and non-rotatable thereon, as is known in the art. The single tooth wheel c2 cooperates with two revolutions counting mechanisms the numeral wheels a and b of which are adapted to be rotated by gears al and 1 located in position for engagement by the single tooth c. The single tooth wheel shows a circumferential grooveJ c3 engaged by a segment c operatively connected with the carriage of the registering mechanism for being shifted thereby axially of the revolutions counting mechanisms for successively engaging the numeral wheels of the different orders of the revolutions counting mechanisms. As appears from Fig. 3, the gears al and b1 of corresponding numeral wheels are disposed approximately within the same plane and they are displaced with relation to each other a distance less than their breadth, so that parts of the gears are within the same plane while the other parts project axially beyond said plane. The single tooth c is adapted to be shifted relatively to the gears al and b1 from the median position indicated in Fig. 3 by the broken line 2 to the right or left and into the positions indicated by the broken lines 1 and 3, and when the single tooth c is in the position 1 it is adapted to engage only the gear a1, when it is in the position 2 it is adapted for engagement with both gears al and b1, and when in the position 3 it is adapted to engage only the gear b1.

For thus shifting the single tooth wheel relatively to the slide r1 the following means are provided. The segment e is secured to the late f mounted on a plate g and guided t ereon by means of a pair of screws f1 secured to the plate f and passing through slots gli, the plategg being rigidlyconnected with Ythe carriage r1 throughV the intermediary of rods u and a lever u1. The plate f is providedl with a` spring pressed locking bolt L the -w'edge'shaped endV of which isl adaptedl VforY locking engagement with either one of three notches 1, i2, i3 made in theV ment with the beveled slots nl and m3, as

will beunderstood fromFig. 5.

In the median position/g2 of the hand crank shown in Fig. ,l the spring pressed bolt hA engages in the median notchrg, and the single tooth c is in the median position represented in "Fig. 3 Vby Vthe lline 2in which it -is` adapted to,` act on'b'oth revolutions counting, mechanisms a and b. The pins o ofthe shafts@ are inlinejwi-th the-axialfslot n3 'of the block a,-so that thesingletooth c can be shiftedV inaxialdirection when shifting the carriage r1. v y y f vhen rocki" g the cranlrpl intofthe position g1l the pin o'ldi'sposed belowt-he -plate f passes throughfthe beveled transverse slotn1L and into the-position shownin Fig. l in dotted lines.r Therebythe lplate f and the4 singlet tooth -ciare shifted into lthe position represented inITig. 3 rby theflinel, so that only the revolutions counting mechanism c' isoperated. f l,

When rocking fthe' crankp1 intoV the position g3 a' similar operation is performed and 4the single tooth c is. setinto position for, cooperation with the revolutions counting mechanism Z).- f i If r'tisdesired fto have?y both revolutions counting mechanisms in operation, the crank p1 is again rocked into the median position g2. Thereby the single toothy c -'is againV broughtxinto the position-2, because the cor.- respondingr pin olpasses 'through the 'beveled transverse-slot 71-1 ory n3 and returns the block 7c into median position in which it is locked bythe bolt-h engaging inthenctch 2; The singleV tooth can'be shifted in2 ithe manner described in any position of the plate gand the-carriage r1, because Vfor each order of the revolutions counting mechanism a pin -o is provided. a

From the foregoing description itivill be understoodtl-iat forthrowing either onevof the revolutions countingmechanisms out of operation the single ltooth wheel and the rerolutions counting mechanisms are shifted relatively to each other in axial direction, and

as shown herein the single tooth is shiftable while the revolutions counting mechanisms are stationary. But I wish it to be understood that I do not limit myself to a construction in which the single tooth wheel is shiftable.

Cla-imi n Y, l. In a calculating machine, the combination, 'withy the shiftable registering mechamsm, of an operating member movable therewith, andftworevolutions counting nisms and operating member so. far that the operating member is adapted for cooperation either with bothV gears or with one of them.

2. Ina calculating machine, the vcombina-- tion, with a shiftable registering mechanism, an operating member, and means intermediate said registering"mechanism and operat- Y ing member for shifting the operating member in axial direction, of two revolutions counting;mechanisms having corresponding gears displaced with relationto each other in axial direction so far that the operating member is adapted for cooperation either with both gears or with one of them-only, means for axially shifting the operating member relatively to said intermediate means, andmeans for locking the operating member in its positions. l y

3. Ina calculating machine, the combination, with a shiftable registeringmechanism, an operating member, means intermediate said registering mechanism'and operating member for shifting the operatingmember in. axialr direction, said `means comprising an axially shiftable plate, a member secured to said plate and engaging the operating member for axially shifting the same, and means for locking said platev in position ,on the intermediate means, of two revolutions countingy mechanisms having corresponding gears displaced with relation'to each other in axial direction soV far'that the 'operating member is'4 adapted for cobperationfeither with both gears or with one ofI them only.

4l. In a! calculating machine, the combination, with a shiftable registering mechanism, an operating 'memben means intermedia-te said registering mechanism andl operating member for shifting. fthe operating member in axial:` direction, said means comprising an axially shiftable plate formed with a cam face, a member secured to said plate and engaging the operating member for. axially shifting Ithe same, a hand operated member adapted 4for engagement with said cam face for axially shifting said plate, and means for locking said plate in position on the intermediate means, of two revolutions counting mechanisms having corresponding gears displaced with relation to each other in axial direction so far that the operating member is adapted for cooperation either with bot-h gears or with one of them only.

5. In a calculating machine, the combination, with a shittable registering mechanism, an operating member, means intermediate said registering mechanism and operating member for shifting the operating member in axial direction, said means comprisingan axially shiftable plate formed with a cam face, a member secured to said plate and engaging the operating member for axially shifting the same, hand opera-ted members one for each order of the revolutions counting mechanisms adapted for engagement with said cam face for axially shifting said plate, and means for locking said plate in position on the intermediate means, of two revolutions counting mechanisms having corresponding gears displaced with relation to each other in axial direction so far that the operating member is adapted for cooperation either with both gears or with one of them only.

6. In a calculating machine, the combination, with a shiitable registering mechanism, an operating member, means intermediate said registering mechanism and operating member for shifting the operating member in axial direction, said means comprising an axially shiftable plate formed with a cam face, a member secured to said plate and engaging the operating member for axially shifting the same, members one for each order of the revolutions counting mechanisms mounted on a common hand operated rock shaft and adapted for engagement with said cam face for axially shifting said plate, and means for locking said plate in position on the intermediate means, ot' two revolutions counting mechanisms having corresponding gears displaced with relation to each other in axial direction so far that the operating member is adapted for cooperation either with both gears or with one of them only.

7. In a calculating machine, the combination, with a shiftable registering mechanism, an operating member, means intermediate said registering mechanism and operating member for shifting the operating member in axial direction, said means comprising an axially shiftable plate formed with a cam face, a member secured to said plate an-d engaging the operating member for axially shifting the same, members one for each order of the revolutions counting mechanisms mounted on a common hand operated rock shaft and adapted for engagement with said cam face for axially 'shifting said plate, said plate being formed with an axial recess in line with said members, and means for locking said plate in position on the intermediate means, of two revolutions counting mechanisms having corresponding gears displaced with relation to each other in axial direction so tar that the operating member is adapted for cooperation either with both gears or with one of them only.

In testimony whereof I have hereunto set my hand.

Dr. Ing. HERMANN HOFFMEISTER. 

